(emacs)Customization

Customization
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This chapter talks about various topics relevant to adapting the
behavior of Emacs in minor ways. See `The Emacs Lisp Reference Manual'
for how to make more far-reaching changes.
All kinds of customization affect only the particular Emacs job that
you do them in. They are completely lost when you kill the Emacs job,
and have no effect on other Emacs jobs you may run at the same time or
later. The only way an Emacs job can affect anything outside of it is
by writing a file; in particular, the only way to make a customization
`permanent' is to put something in your `.emacs' file or other
appropriate file to do the customization in each session. Note:Init
File.